World Families Forums - where did the S116 SNP occur?

Welcome, Guest. Please login or register.
July 29, 2014, 10:30:05 AM
Home Help Search Login Register

+  World Families Forums
|-+  General Forums - Note: You must Be Logged In to post. Anyone can browse.
| |-+  R1b General (Moderator: rms2)
| | |-+  where did the S116 SNP occur?
« previous next »
Pages: [1] Go Down Print
Author Topic: where did the S116 SNP occur?  (Read 805 times)
alan trowel hands.
Guru
*****
Offline Offline

Posts: 2012


« on: October 16, 2009, 08:10:59 AM »

S116* is far more widespread than L21 making it pretty hard to narrow down its point of origin.  The problem is we do not know what part of the S116* paragroup is really an S116* i.e. ancestral clade of L21.  Has anyone looked at any differences in the STRs from S116* in the different areas.  I wonder if the S116* in any particular area is more similar to the upstream S116 negative clades.  That might give a clue as to where the S116 mutation happened.  Likewise where is the most L21-like S116*. 

I think it seems very likely from distribution that we can at least narrow down L21's origin to somewhere in Europe north of the Alps but S116 in contrast appears on both sides of the Alps meaning it is very difficult to even guess which route it took west from the S116 negative/S21 negative areas to the south-east.  The two main routes into Europe and when travelling east to west through Europe in prehistory consisted of the riverine one along the Danube and the sea-borne Mediterranean one.  For me that is one of the most fundamental missing links in the story. 

Logged
alan trowel hands.
Guru
*****
Offline Offline

Posts: 2012


« Reply #1 on: October 16, 2009, 08:47:38 AM »

I should add that it is very hard to find the the archaeological record any process that would have taken so much S116 and subclades deep into west-central Europe from a Med. route.
Logged
Mike Walsh
Guru
*****
Offline Offline

Posts: 2963


WWW
« Reply #2 on: October 16, 2009, 10:18:39 AM »

I have been looking at that these maps representing R-P312+ folks.... nothing jumps out at me but "European" but NOT "SE (Balkans) European".

On the other hand, VinceV's ht35 project shows R-M269 P312- folks radiate out of SE Europe and apparently SW Asia.

R-P312* Eurasia Map
http://maps.google.com/maps/ms?msa=0&msid=102956803377716741902.000451315c3a8da9708e0

R-L21* Eurasia Map
http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=102956803377716741902.00046b7a409c362d5ef65&z=3

R-U152 Eurasia Map
http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=116137979488210255883.00044e170d065ca91df35&z=4

You must add a  of R-M153 and R-SRY2627 to Iberia to complete the picture of R-P312+.
Logged

R1b-L21>L513(DF1)>L705.2
GoldenHind
Old Hand
****
Offline Offline

Posts: 731


« Reply #3 on: October 16, 2009, 03:20:17 PM »

S116* is far more widespread than L21 making it pretty hard to narrow down its point of origin.  The problem is we do not know what part of the S116* paragroup is really an S116* i.e. ancestral clade of L21.  Has anyone looked at any differences in the STRs from S116* in the different areas.  I wonder if the S116* in any particular area is more similar to the upstream S116 negative clades.  That might give a clue as to where the S116 mutation happened.  Likewise where is the most L21-like S116*. 

I think it seems very likely from distribution that we can at least narrow down L21's origin to somewhere in Europe north of the Alps but S116 in contrast appears on both sides of the Alps meaning it is very difficult to even guess which route it took west from the S116 negative/S21 negative areas to the south-east.  The two main routes into Europe and when travelling east to west through Europe in prehistory consisted of the riverine one along the Danube and the sea-borne Mediterranean one.  For me that is one of the most fundamental missing links in the story. 


My suspicion, and it is largely speculation, is that P312/S116 first arose somewhere in the east, and then split into two branches. One branch entered Europe along the Mediterranean, the other up the Danube valley. It makes sense that L21 developed out of the Danube branch, and expanded from a location in central Europe north of the Alps.
Meanwhile I think the Mediterranean branch expanded up the Atlantic coast, while the Danube branch expanded to the north and northwest, and the two branches met up and intermingled.
However the P312* WTY project is finally starting to show some new SNPs, so before too long we may be able to break down some subclades currently hiding under the P312* umbrella. With luck this may tell us something more than we currently know about the history and distribution of R1b in Europe.
Logged
alan trowel hands.
Guru
*****
Offline Offline

Posts: 2012


« Reply #4 on: October 16, 2009, 03:42:26 PM »

Goldenhind

I agree that makes perfectly good geographical sense to a degree.  If S116 had already occurred at a common origin point where the Danubian and Med. routes meet such as the north Balkans and then set off in the two directions with L21 and S28 happening among the group who headed along the Danube then that would mean a purely S116* group would move along the Med. while a mix of S116, S28 and L21 arose along the Danube.  Despite the late variance dating, that sounds awfully like the Cardial/Linearbandkeramik split.   

Another potential model is that S116 all initially spread along the Med. and around the Atlantic facade of Iberia with the L21 mutation only happening when S116 reached NW France then spreading into the rest of France and the isles from there.  However, I find the idea of an L21 origin in NW France very hard to tally with the heavy presence in SW Germany and the Rhine.  I cant think of anything other than a very very convuluted model to explain that jump (super fertile metal traders etc).  I cant really see how that route could fit any earlier Neolithic scenario either.   
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  


SEO light theme by © Mustang forums. Powered by SMF 1.1.13 | SMF © 2006-2011, Simple Machines LLC

Page created in 0.185 seconds with 18 queries.